As far as kelp goes, this seems as good as any. I didn't see any positive effects but short-term those are hard to detect if nothing is really wrong in the first place.
However, I have acne-prone skin and the iodine in these made me break out. Took me a while to realize it was the kelp but as soon as I stopped taking it, my skin started improving. I guess that proves that it does contain a decent amount of iodine, as that is known to cause break-outs.